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- Title
Branched-Chain Reaction of Dichlorosilane Chlorination in the Presence of Inhibiting and Deactivating Additives.
- Authors
Rubtsov, N. M.; Tsvetkov, G. I.; Chernysh, V. I.
- Abstract
Dichlorosilylene (SiCl2) was identified along with SiHCl radicals in the chlorination reaction of dichlorosilane at low pressures and 293 K. The inhibiting effect of propylene additives (> 4 vol %) on the self-ignition of dichlorosilane mixtures with molecular chlorine was found. In the presence of a chemically inert additive of SF6 (>45%), the inhibiting effect was dramatically increased; this fact is an indication that energy factors play an important role. The absence of a isothermal flame propagation regime under experimental conditions suggests that chain branching occurs in a reaction whose rate is a linear function of the concentration of active centers. A kinetic mechanism was proposed, which includes the participation of silylenes in the branching process with the formation of excited states. This mechanism qualitatively describes the experimentally observed behavior.
- Subjects
CHLORINATION; LOW pressure (Science); PHYSICAL &; theoretical chemistry; HALOGENS; FORCE &; energy; RADICALS (Chemistry)
- Publication
Kinetics & Catalysis, 2003, Vol 44, Issue 1, p20
- ISSN
0023-1584
- Publication type
Article
- DOI
10.1023/A:1022512516063